package com.example.gatewaywt.filter;

import com.example.jwt.JwtUtil;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class LoginFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        HttpHeaders headers = request.getHeaders();
        String token = headers.getFirst("authorization");
        if(JwtUtil.checkToken(token))
        {
            return chain.filter(exchange);
        }
        else
        {
            MultiValueMap<String, String> params = request.getQueryParams();
            String authorization = params.getFirst("authorization");
            if("admin".equals(authorization))
            {
                return chain.filter(exchange);
            }
        }


        exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        return  exchange.getResponse().setComplete();
    }

    @Override
    public int getOrder() {
        return -1;
    }
}
